/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements. See the NOTICE file distributed with this
    * work for additional information regarding copyright ownership. The ASF
    * licenses this file to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations under
   * the License.
   */
  package org.apache.hadoop.hbase.io.crypto;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertNotNull;
  
  import java.io.File;
  import java.io.FileOutputStream;
  import java.net.URLEncoder;
  import java.security.Key;
  import java.security.KeyStore;
  import java.security.MessageDigest;
  import java.util.Properties;
  
  import javax.crypto.spec.SecretKeySpec;
  
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.hadoop.hbase.HBaseCommonTestingUtility;
  import org.apache.hadoop.hbase.testclassification.SmallTests;
  import org.apache.hadoop.hbase.util.Bytes;
  import org.junit.BeforeClass;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  
  @Category(SmallTests.class)
  public class TestKeyStoreKeyProvider {
  
    private static final Log LOG = LogFactory.getLog(TestKeyStoreKeyProvider.class);
    static final HBaseCommonTestingUtility TEST_UTIL = new HBaseCommonTestingUtility();
    static final String ALIAS = "test";
    static final String PASSWORD = "password";
  
    static byte[] KEY;
    static File storeFile;
    static File passwordFile;
  
    @BeforeClass
    public static void setUp() throws Exception {
      KEY = MessageDigest.getInstance("SHA-256").digest(Bytes.toBytes(ALIAS));
      // Create a JKECS store containing a test secret key
      KeyStore store = KeyStore.getInstance("JCEKS");
      store.load(null, PASSWORD.toCharArray());
      store.setEntry(ALIAS,
        new KeyStore.SecretKeyEntry(new SecretKeySpec(KEY, "AES")),
        new KeyStore.PasswordProtection(PASSWORD.toCharArray()));
      // Create the test directory
      String dataDir = TEST_UTIL.getDataTestDir().toString();
      new File(dataDir).mkdirs();
      // Write the keystore file
      storeFile = new File(dataDir, "keystore.jks");
      FileOutputStream os = new FileOutputStream(storeFile);
      try {
        store.store(os, PASSWORD.toCharArray());
      } finally {
        os.close();
      }
      // Write the password file
      Properties p = new Properties();
      p.setProperty(ALIAS, PASSWORD);
      passwordFile = new File(dataDir, "keystore.pw");
      os = new FileOutputStream(passwordFile);
      try {
        p.store(os, "");
      } finally {
        os.close();
      }
    }
  
    @Test(timeout=30000)
    public void testKeyStoreKeyProviderWithPassword() throws Exception {
      KeyProvider provider = new KeyStoreKeyProvider();
      provider.init("jceks://" + storeFile.toURI().getPath() + "?password=" + PASSWORD);
      Key key = provider.getKey(ALIAS);
      assertNotNull(key);
      byte[] keyBytes = key.getEncoded();
      assertEquals(keyBytes.length, KEY.length);
      for (int i = 0; i < KEY.length; i++) {
        assertEquals(keyBytes[i], KEY[i]);
      }
    }
  
    @Test(timeout=30000)
    public void testKeyStoreKeyProviderWithPasswordFile() throws Exception {
     KeyProvider provider = new KeyStoreKeyProvider();
     provider.init("jceks://" + storeFile.toURI().getPath() + "?passwordFile=" +
       URLEncoder.encode(passwordFile.getAbsolutePath(), "UTF-8"));
     Key key = provider.getKey(ALIAS);
     assertNotNull(key);
     byte[] keyBytes = key.getEncoded();
     assertEquals(keyBytes.length, KEY.length);
     for (int i = 0; i < KEY.length; i++) {
       assertEquals(keyBytes[i], KEY[i]);
     }
   }
 }